Roller mill



R. GOLL ROLLER MILL Nov. 15, 1938.

Original Filed April 50, 1955 5 Sheets-Sheet l Rm, ARD @QLL NOV. 15,1938. R GQLL Re. 20,918

ROLLER MILL Original Filed April 30, 1935 5 Sheets-Sheet 2 REM NRD 0LLR. GOLL ROLLER MILL Nov. 15, 1938.

Original Filed April 50. 1955 5 Sheets-Sheet 3 RmMARDeoLL.

ROLLER MILL originalFiled April 30, 1935 5 Sheets-Sheet 4 Rm ARD sum.

NOV. 15, 1938. GOLL Re. 20,918

ROLLER MILL Original Filed April 30. 1935 5 Sheets-Sheet 5 m A W \s 3RKMRRD SOLA- 6 Reissucd Nov. 15, 1938 UNITED STATES PATENT OFFICE ROLLERMILL Original No. 2,093,606, dated September 21, 1937,

Serial No. 19,010, April 30, 1935.

Application for reissue April 30, 1938, Serial No. 205,381

Claims.

The present invention relates to roller mills, and more particularly toan improved roll operating means therefor. In this type of mill, forgrinding ink, paint and other materials, the rolls are individuallyadjusted with great care and delicacy and after they are once soadjusted it is advantageous to maintain such adjustment so as to avoidrepeating this delicate operation each time the rolls are opened forcleaning and for other well known reasons. It has also been found that afiner adjustment and other advantages are obtained by placing the rollswith their axes in a straight line, either horizontally or verticallywith the latter preferred, so that the rolls and the spaces between themmay be better inspected to facilitate the handling of the mill, and theproblem is to admit of this line and delicate individual adjustment ofthe rolls and also admit the quick acting opening and closing of all ofthe rolls without disturbing the fine adjustment and by use of a singleinstrumentality, such as a lever.

It is therefore an object to provide a single mechanism for operatingall of the rolls of the mill to separate and return the rolls withoutdisturbing their individual fine adjustments.

Another object is to provide a single mechanism for operating all of therolls and which, when the rolls are closed together for normaloperation, is automatically locked without the use of supplementallocking devices to hold the rolls in operating position.

A further object of this invention is to provide a single operatingmechanism for all of the rolls which is applicable to mills having theirrolls arranged with the axes vertically in line so that all of theadvantages of this type of mill may be maintained with the improvedsingle mechanism applied thereto.

With the foregoing and other objects in view, the invention will be morefully described hereinafter, and will be more particularly pointed outin the claims appended hereto.

In the drawings, wherein like symbols refer to like or correspondingparts throughout the several views:

Figure l is a side elevation of a roller mill embodying the features ofthis invention and showing the single roll operating means in lockedposition for normal operation of the rolls.

Figure 2 is a front elevation of the roller mill with the frame brokenaway at one end to show the single roll operating mechanism.

Figure 3 is an end elevation of a roller mill,

showing a modified form of the single roll operating mechanism.

Figure 4 is a similar view showing another modified form of the rolloperating mechanism for simultaneously opening the rolls.

Figure 5 is a detail fragmentary sectional view taken through the rolloperating mechanism at one end of the mill shown in Figure 1, and

Figure 6 is a side elevation of the same, partly broken away and showingthe eccentric structure.

Referring now to the drawings, and first to Figures 1, 2, 5 and 6, themill is provided with a conventional type of frame I5 in which aredisposed a plurality of adjustable rolls I8, I1, I! and a fixed roll ISon one side thereof, the same having their axes in line and with therolls disposed vertically relative to each other as shown. The rolls aremounted at opposite ends in bearing blocks 2ll which are slidablydisposed in the frame i5 so that the blocks 2|) may be relativelyremoved for spacing the rolls at a desired distance apart, according tothe character and viscosity of the material to be ground in the mill.

The bearing blocks are adjusted independently in the frame i5 by gearing2i with a gearing provided for each bearing block, and each gearinghaving a shaft 22 with a hand wheel 23 on its outer end by means ofwhich the gearing may be operated in the usual manner for obtaining anice or fine adjustment of the rolls relatively one to the other and atopposite ends.

According to the present invention means is provided for simultaneouslymoving or operating the rolls i6, i1 and It, or any other desired numberof rolls used in the mill and which are adjustable relative to eachother and to the stationary roll I9. As shown in Figure 5, there is anadjustable connection between the frame I5 and the endmost bearingblocks 20 of the rolls. Each connection comprises an adjustment screw 66having a head 24 serving as a bearing lug in the form of a projectionwhich fits between a pair of bearing lugs 25 and 25' carried upon theadjacent end of the block 20. All of the elements 24, 25 and 25' areprovided with substantially registering coaxial openings therethroughand there is provided sufiicient clearance in the throat between thebearing block lugs 25 and 25' to admit of the movement of the head orlug 24 be tween the lugs 25 and 25 so as to move the bearing block 20toward and away from the frame l5 as will now be described.

An eccentric shaft 26 is journaled in bearing block lugs 25 and 25' andis provided at its center with an eccentric portion ll acting as a crankarm and fitted with a sleeve or bearing bushing 21 to maintain theeccentric shaft I. in coaxial alinement with the bore of the lug 24. Theshaft 28 is provided at the outer side of the lug 24 with a journal IIand the free end of the eccentric shaft 28 is mounted in a suitablehearing or bushing 28 provided in the opposite lug I! of the bearingblock. The outer or other end of the eccentric shaft 26 is provided witha crank arm 30 which has a hub portion secured to shaft It serving as ahead or shoulder bearing against the lug 25, while a pin or the like maybe used upon the free end of the shaft 2| to hold it from withdrawalfrom the lugs and 2!. The crank arm ill is disposed normally in a raisedposition. as shown in Figures 1 and 6, and wherein the eccentric portionII is at dead center with respect to the elements 24, II and II so as tolock these elements in their normal position with the rolls of the millin operative position and adjusted according to the fine adjustment ofthe gearing ii. The eccentric portions ll of each shaft 20 are sodisposed relative to the bearing blocks that when the crank arms Iii ofall of the connections are moved in one direction the blocks will becorrespondingly moved in such directions as to space the rolls apart andthus open them for cleaning, inspection or other operations required inthe raising of the mill.

It will be noted that these eccentric portions ll do not disturb thegearing 2| as the latter operates only on the lugs 24 relative to theframe ll so that these quick acting connections of the present inventionmerely provide links or connections between the gearings ll and theiradjacent blocks 20. It will also be noted that the axes of the rolls aredisposed in line and the crank levers extend laterally in one directionand are coupled together by a connecting link ll so as to insure uniformmovement of the arms or levers Ill and consequently the uniformseparation or advancement of the rolls relative to one another. The fineadjustment of the rolls with respect to each other is accomplished bythe mechanism shown at the top of Fig. 5. The shaft 22 is provided witha worm gear 4| which meshes with gear 61. The latter gear is mountedbetween two bosses B8 and Ill forming part of the frame II. This gear 81is axially bored and the bore is internally threaded with a worm whichmeshes with threads on shaft 66. It is evident that. upon rotation ofshaft II. the shaft 8' is moved axially, the motion of this shaft thusraising or lowering the bearing block III through the connections 24,21, 65, It, 28, I! and 25'. This fine adjustment of the bearing blocks20 with respect to the frame i5 is independent of the movement producedby the quick acting mechanism described above.

The single operating mechanism for the rolls also includes an operatinglink 82 which is connected to the connecting link ll at preferably theupper end thereof and which is also connected to a crank arm 33 on acrank shaft 34 mounted in the frame It and provided with an operatinghandle 35.

In the normal position on the operating mechanism the operating link I!and the crank arm 33 are in a dead center position so as to lock theparts against any tendency for movement out of their normal position.

As shown by the dotted lines in Figure 1, the crank arm SI swingsthrough a substantial are when the handle 35 is raised so as to breakthe dead center position of the mechanism and to draw the operating link32 downwardly by the turninghof the crank arm a which affects thedownward movement of the connecting link II and the simultaneous andequal swinging downwardly of the crank levers Ill. Thus. the eccentricportions 85 (Fig. 5) of all of the quick opening connections areactuated so that all of the movable rolls are shifted into open positionand without disturbing the fine and delicate adjustments of the gearing2|.

As a modification of the invention, another structure is shown in Figure3. In this form of the invention the rolls are provided on their endswith eccentrics It which are connected by gearing 31 to shafts 38 havinghand wheels 39 on their outer ends by means of which the rolls may beindividually adjusted so as to obtain a nice and delicate adjustmentbetween'the rolls. In addition to this each shaft I! is provided with aneccentric housing 40 intermediate its length in which is disposed aneccentric 4i mounted on a shaft 42 and having a lever 43 thereon, thelever 43 adapted to swing through the are shown in broken lines forturning the eccentric 4| and quickly moving the shaft 38 longitudinallyof its axis to effect a quick turning of the eccentric 88 of the roller.

The levers 43 are connected together at their outer ends by a connectinglink 44 and the latter is connected at preferably one end to anoperating link 45 which is pivoted to a crank arm 46 mounted on theshaft 41 suitably disposed in the frame It and which is adapted to beoperated in the manner shown in Figure 1 for simultaneously swinging thelevers 48 out of and back into normal position for opening and closingthe rolls without disturbing the fine and delicate adjustment of thesame by the respective gearlngs 31.

In Figure 4 another modification is shown and wherein the eccentricshafts 28 of Figures 5 and 6 are provided with pinions 48 on their outerends in place of the crank levers ill, and wherein a rack bar 49 isslidably mounted at the side of the frame iii and has toothed portionsdisposed opposite the pinions 48 and which mesh with these pinions atall times so as to simultaneously and equally turn the pinions upon theshifting of the rack bar 49. The rack bar 49 may be shifted in anysuitable manner, such as by means of an operating pinion 50 mounted onthe shaft Ii in the frame It, and the latter may have a crank handle orthe like thereof for turning the shaft iii the required distance forturning all of the eccentric shafts it simultaneously and equally toopen and close the rolls of the mill.

It will be particularly noted that in all of these forms of theinvention the rolls are disposed in line, that is the rolls which aremovable; and consequently by the novel means of this invention theserolls may be quickly operated by one mechanism so as to open and closethe rolls without disturbing in any manner the fine and delicateadjustment which is obtained by the individual gearing of the rolls.

It will also be noted that in each form the movement for each roll isdifferent from that for the other rolls in order to move the rollsthrough unequal distances, to the end that they will be spaced apartsubstantially by equal distances when opened. It is also apparent that asingle operating member coordinates the movement of all the rolls tocause them to move freely apart as soon the movement commences. Theeccentric arrangement keeps the roll movement under accurate control atall times. The drawings show exemplary forms of eccentric means. InFigure 5 the eccentrics or cams 66 are shown to have unequal throws. andthe same is true of the eccentrics or cams 4i shown in Figure 3. All ofthe eccentrics are moved by a single common control member in each case.

In operation, when it is desired to open the rolls quickly it is onlynecessary to operate a single device, such as the crank handle 8! inFigure 1, the shaft 41 in Figure 3 and the shaft 50 in Figure 4. In eachinstance the respective crank shafts 26 of Fig. 4 and 42 of Fig. 3 areturned to rotate the eccentrics 6i and H for moving the respectivebearings of the rolls into open and closed positions. As shown in Figure2, the operating shaft 34 extends from one end of the mill to the otherso that the operating handle 85 which turns the shaft 34 may operate thequick connections at the opposite ends of the rolls. The rolls are thusbodily separated when the single operating device or mechanism isactuated for that purpose.

It is obvious that various changes and modifications may be made in thedetails of construction and design of the above specifically describedembodiment of this invention without departing from the spirit thereof,such changes and modifications being restricted only by the scope of thefollowing claims:-

What is claimed is:-

1. In a roller mill, a frame, a plurality of rolls mounted in the frameand having bearing blocks slidable therein, individual adjusting meansfor the rolls disposed between the frame and the respective bearingblocks for obtaining delicate adjustments between the rolls, eccentricconnections disposed between the bearing blocks and said individualadjusting means and each having an operating lever, a connecting linkconnecting all of said levers, and a dead center operating deviceconnected to said connecting link for normally holding the same lockedin the normal position and adapted for movement to release theconnecting link and shift the same to simultaneously operate theeccentrics and open the rolls.

2. In a roller mill, a frame, a plurality of rolls mounted in line inthe frame and having hearing blocks slidable in the frame such that theaxes of said rolls are slidable in a single plane. fine adjustmentconnections between the bearing blocks and the frame for individuallyadjusting the rolls, eccentric connections between the fine adjustmentconnections and the bearing blocks for quickly opening and closing therolls, and a common operating means extending along the line of saidrolls and connected to the eccentrics of said connections forsimultaneously operating the same to open and close the rolls.

3. In a roller mill, a frame. a plurality of rolls in the frame, bearingblocks for each of said rolls slidable in a single plane in the frameand maintaining the axes of said rollers in a single plane, lugs mountedfor fine adjustment of the blocks in the frame, lugs on the bearingblocks for overlapping engagement with the lugs on the frame, eccentricshafts connecting the lugs of the frame and bearing blocks together andhaving eccentrics engaging in the lugs for turning therein by theeccentric shafts to draw said lugs into overlapping relation and shiftthe bearing blocks in the frame and common operating means for all ofthe eccentric shafts to simultaneously turn the same in one directionfor opening the rolls and in the opposite direction for closing therolls without disturbing the mounting of said lugs on the frame.

4. In a roller mill, a frame. a plurality of rolls mounted in the framewith their axes in line, individual fine adjustment means between theframe and the rolls, coarse adjustment means between said first meansand the rolls for opening and closing the same without disturbing thefine adjustment means, said coarse adjustment means including individualeccentric shafts for the rolls, a pinion mounted on each shaft with thepinions disposed in line at the end of the frame, a rack bar engagingacross said pinions, and a single operating member connected to the rackbar for shifting the same in one direction to quickly open the rolls andin opposite direction to quickly close the rolls.

5. A roller mill comprising a frame, a stationary roll mounted in saidframe, a plurality of adjustable rolls in said frame, bearing blocks foreach of said adjustable rolls, said blocks being slidably mounted in theframe for adjustment of said rolls, individual fine adjustment meansbetween the frame and the bearing blocks for obtaining delicateadjustment of said rolls, quick acting eccentric connections between therolls on the bearing blocks for adjustment of the rolls relative to thebearing blocks independently of the fine adjustment of the bearingblocks, a lever for operating each of said quick acting eccentrics, arigid link pivotally connecting all of said levers, a single operatinglever for moving said rigid link and toggle means connecting said leverwith said link to provide a dead center look when the rolls are inoperating position.

6. In a roller mill, a frame, a stationary roll mounted in said frame, aplurality of adjustable rolls mounted in line in the frame on one sideof said stationary roll and journaled in bearing blocks slidably mountedin said frame, the axes of said adjustable rolls lying in a single planeand said rolls being adjustable in said plane, individual fineadjustment means between the frame and the bearing blocks for obtainingdelicate adjustment of said rolls, individual eccentric meansoperatively connected to said bearing blocks for quickly moving saidadjustable rolls in a straight line and through unequal distancestowards and away from said stationary roll, and a common operating meansextending along the line of said rolls and connecting said eccentricmeans for producing simultaneous operation of said eccentric meansconstructed and arranged in such manner that said rolls can be movedsimultaneously and separated from each other as well as from saidstationary roll without disturbing the setting of said fine adjustmentmeans.

7. The roller mill of claim 2 wherein one of said rolls is stationaryand wherein the adjustable rolls are mounted on one side of thestationary roll.

8. In a roller mill, a frame, a stationary roll mounted in said frame, aplurality of adjustable rolls mounted in line in the frame on one sideof said stationary roll and journaled in bearing blocks adjustablymounted in said frame, the axes of said adjustable rolls lying in asingle plane and said rolls being adjustable substantially in saidplane, individual fine adjustment means between the frame and thebearing blocks for obtaining delicate adjustment of said rolls,individual eccentric means operatively connected to said bearing blocksfor quickly moving said adjustable rolls in substantially a straightline and through unequal distances toward and away from sald stationaryroll. and a common operating means extending along the line of saidrolls and connecting said eccentric means for producing simultaneousoperation of said eccentric means constructed and arranged in suchmanner that said rolls can be moved simultaneously and separated fromeach other as well as from said stationary roll without disturbing thesetting oi said fine adjustment means.

9. A roller mill comprising in combination. a irame, a train of mutuallyco-acting rolls mounted in said frame, said train including a fixed rolland a plurality of adjustable rolls provided with bearings adjustablymounted in line on one side of said fixed roll, means for imparting afine working adjustment to the bearings 01 said adjustable rolls. andquick-acting means providing coordinated movement of the bearings 01 allor said adjustable rolls through progressively increasing distances awayfrom or toward said fixed roll to completely separate and reset therolls without changing the working relationship said rolls as determinedby the setting of the fine adjusting means, said quick-acting meansincluding means disposed in a locking position when the rolls are resetin a closed relationship to provide a rigid non-shittable resistance tothe roll bearings.

10. A roller mill comprising in combination, a frame, a train ofmutually co-acting rolls mounted in said irame, said train including afixed roll and a plurality of adjustable rolls provided with bearingsadjustabiy mounted in line on one side of said fixed roll, means forimparting a fine working adjustment to the bearings of each 0! saidadjustable rolls, and quick-acting means providing co-ordinated movementof the bearings 01 all of said adjustable rolls through progressivelyincreasing distances away from or toward said fixed roll to completelyseparate and reset the rolls without changing the working relationshipof said rolls as determined by the setting otthe fine adjusting means,said quick-acting means including eccentric means and unitary operatingmeans therefor providing diilerent amounts of movement for the bearingsof the different rolls of the same movement of said unitary operatingmeans, said eccentric means being placed in a dead center lockingposition when the rolls are closed to working position.

RICHARD GOLL.

CERTIFICATE OF CORRECTION. Reissue No. 20,918. November 15, 1938.RICHARD GOLL.

It is herebycertified that error appears in the printed specification ofthe above numbered patent requiring correction as follows: Page 2,second column, line 72; after the word Egoon" insert as; page 1;, secondcolumn, line 21, claim 10, for "of" after 'rolls" read for; and that thesaid Letters Patent should be read-with this correction therein that thesame may conform to the record of the case in the Patent Office,

Signed and sealed this 51st day of January, A. D. 1959.

Henry Van Arsdale (seal) Acting Commissioner of Patents.

